Djay Pro AI not playing songs

I recently upgraded from Djay Pro 2 (which works perfectly) to AI. Everything works perfectly and songs will load up but I cannot play them? I have tried all sources (tidal, soundcloud, local files) and the same problem occurs. The play button just eep flashing, and am unable to move the needle throughout the songs waveforms, it just seems stuck.

Is there something obvious I am missing?